Chuck Norcutt wrote:
> Yes, at least in my case, looking for green reflections as indicative of
> multicoating. As I recall, this was judged by some to be unreliable. But,
> for my own experience with my own Zuikos, I've never seen an x.Zuiko that
> reflects anything green (blues, reds and yellows only) and any lens I have
> that says "MC" or has a serial number newer than the "MC" marking period all
> reflect green. But I have multicoated Kirons that don't reflect green.
>
I wasn't here for that project. Having read some about it, I was
surprised when I sat down to peer deeply into two 24/2.8 lenses, one SC,
one MC. Yes indeed, there were different colors, but the most striking
thing was how much dimmer the MC reflections were. That's the point, of
course, but it interested me how immediately obvious it was which lens
was MC without bothering to check individual reflection colors.
> I suspect great caution is required here since it was reported back then that
> Olympus first started multicoating selected elements long before all elements
> were multicoated and supposedly before "MC" became an important marketing
> factor and placed prominently on the lens. It is probably much more
> important to multicoat certain interior elements to control interior
> reflections than it is to multicoat the front side of the front element which
> would only make a miniscule improvement in light transmission.
>
Yes, I think it's clear that there was a continuous development of MC
technology during that time.
Moose
> Chuck Norcutt
>
>
> Moose wrote:
>
>
>>>
>>>
>> If I recall correctly, those were the days of peering deep into the lens
>> looking at reflection colors. Wasn't the "MC" column to be a judgment
>> based on observation of the coating themselves? Others, and I to a
>> limited extent, have noticed that the coatings changed character with
>> later production within both SC & MC. This may have been a late version
>> of mostly single coating with a different formula and/or a multiple
>> coating or two that fooled the eye.
>>
--
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